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- 저자 : ( Qusay Fareed Shallal ) (검색결과 1 건)
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Effective water management strategies for hydroponic systems for growing lettuce
( Qusay Fareed Shallal ),( Seong-gu Hong ) 한국농공학회 2018 한국농공학회 학술대회초록집 Vol.2018 No.-
Iraq is expected to face a major problem in water scarcity, especially in the near term because of climate change and foreign policies of neighbor countries as well. Therefore, the focus has been on minimizing the depletion of water within the Tigris and Euphrates rivers and their sources, especially in the field of agriculture, as one of the solutions is hydroponics system as a modern systems in Iraq by can reduce the irrigation water by almost half. Hydroponic mean the process that cultivated of plants in water without soil, by mixing salts with water to form a nutrient solution. Hydroponics can be divided into two main parts: open system and closed system. The open system uses the nutrient solution once, is discarded, and cannot be reused again. In the closed system, the nutritious solution is reused again after adding a few nutrients as compensation for the lack of consumption rather than replacing the solution. This experiment reinforces the possibility of reusing the nutrient solution while managing the changes that occur in the nutritious solution. By using solar distillation technology in combination with hydroponics, the water irrigation used for agriculture can be reduced further compared to other systems that are more expensive and require significant maintenance. Distillation system are several processes to remove impurities, salts and heavy metals from improper water and convert them into potable water and other essential uses and industrial .in small and simple uses solar water still can be used because of cheap costs especially in Iraq and west-Indian Islands, Kuwait, Saudi Arabia. However, this system has not been used in a wide range because of the low productivity of water extracted from it. In this experiment, an amount of (740 ml/ cm²) of pure water was obtained by using 2 liters brackish water in summer season. In addition, some factors have been studied to help increase productivity such as plastic cover and glass cover, use insulation material or not, effect of the difference of water depth on production, and the effect of high and Low temperature.
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